JP6814566B2 - Printing equipment - Google Patents

Description

The present invention relates to a printing apparatus including a supply unit that supplies sheets one by one to the printing unit.

Conventionally, a printing device using a sheet as a printing medium includes a sheet supply device that supplies a large number of sheets stacked on a paper stack to the printing unit one by one from the top. As a conventional sheet supply device of this type, for example, there is one described in Patent Document 1.

The sheet supply device disclosed in Patent Document 1 includes a soccer device that takes out sheets one by one from a paper stack on which a large number of sheets are stacked, and a feeder board that sends the sheets taken out by the soccer device to a printing unit. I have. The soccer device attracts the top sheet on the paper stack with negative pressure air and sends it to the printing unit side. The feeder board is configured to convey the sheet by a conveying belt.

This sheet supply device is configured to be driven by a single motor other than the motor that drives the printing unit. Therefore, in the printing apparatus shown in Patent Document 1, it is possible to adjust the rotation phases of the printing unit and the sheet feeding device and finely adjust the timing of delivering the sheet from the sheet feeding device to the printing unit.
By the way, in the printing industry in recent years, it is desired to further speed up the printing apparatus.

JP-A-2009-34948

In order to operate the printing apparatus at high speed, the sheet must be supplied to the printing unit at high speed. However, in the conventional printing apparatus as shown in Patent Document 1, it is difficult to accurately supply the sheets stacked on the paper stack from the first sheet at high speed. The reason for this is that the soccer device and the feeder board operate at high speed, which causes problems in each of these devices.

That is, when a soccer device operating at high speed sucks the first sheet, a plurality of sheets may be overlapped and conveyed. Further, in a feeder board operating at a high speed, since the transfer of the leading sheet becomes unstable, registration improperness is likely to occur in the register portion of the feeder board.
The printing apparatus shown in Patent Document 1 finely adjusts the phases of the printing unit and the sheet feeding apparatus, which are driven at a constant speed. Therefore, in this printing apparatus, it is not possible to stabilize the transfer of sheets in the sheet feeding apparatus when printing is started at a high speed as described above.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a printing apparatus capable of supplying a printing unit from a leading sheet at high speed and accurately at the start of printing.

In order to achieve this object, the printing apparatus according to the present invention has a printing unit for printing on a conveyed sheet and a supply unit for supplying one sheet to the printing unit, and prints on the sheet. The printing unit driving means for driving the printing unit, the supply unit driving means for driving the supply unit, the printing unit phase detecting means for detecting the phase of the printing unit, and the phase of the supply unit. A supply unit phase detecting means for detecting the above, and a control means for driving the supply unit by the supply unit driving means based on the detection results of the printing unit phase detecting means and the supply unit phase detecting means at the start of printing. After the printing unit is driven by the printing unit driving means, the supply unit accelerates while starting the supply of sheets at a low speed by the supply unit driving means, and supplies the first sheet to the printing unit. In some cases, it is driven at the same speed as the driving speed of the printing unit.

The printing apparatus according to the present invention has a printing unit that prints on a conveyed sheet and a supply unit that supplies one sheet to the printing unit, and supplies the sheet in the printing apparatus that prints on the sheet. The unit has a suction area divided into a plurality of parts in the sheet transport direction, and the feeder board that transports the sheet and supplies it to the printing unit and the tip suction area that is the most downstream side in the sheet transport direction in the suction area. The open-air valve connected to the above and the open-air valve closed until the first seat reaches the tip suction area, and the open valve opens when the second seat reaches the tip suction area. It is equipped with a control device that controls the opening and closing operation of the air release valve.

According to the present invention, in the printing apparatus, the supply unit further has a suction area divided into a plurality of parts in the sheet transport direction, and a feeder board that transports the sheet and supplies it to the printing unit, and the suction area. The control means is provided with an air release valve connected to the tip suction area on the most downstream side in the seat transport direction, and the control means closes the air release valve until the leading seat reaches the tip suction area. It may have a function of controlling the opening / closing operation of the atmosphere opening valve, which opens the atmosphere opening valve when the seat of the above reaches the tip suction area.

In the present invention, the supply unit operates at a low speed to start supplying the leading sheet, and then increases the speed. Therefore, the leading sheet is surely taken out by the supply unit and sent to the printing unit. The leading sheet is supplied to the printing unit in a state where the supply unit accelerates and is driven at the same speed as the driving speed of the printing unit. Further, when the first sheet is supplied from the supply unit to the printing unit, the supply unit and the printing unit may be synchronized based on the detection results of the supply unit phase detecting means and the printing unit phase detecting means. it can. Therefore, the first sheet is correctly supplied from the supply unit to the printing unit.
Therefore, according to the present invention, it is possible to provide a printing apparatus capable of supplying a printing unit from the first sheet at high speed and accurately at the start of printing.

According to the invention in which the first seat reaches the tip suction area with the air release valve closed and the atmosphere release valve opens when the second seat reaches the tip suction area, the suction force of the first seat is high. It can be conveyed by the feeder board in the state, and the second and subsequent sheets can be conveyed so that the register adjustment is correctly performed in the tip suction area of the feeder board.
Therefore, according to the present invention, there is provided a printing device capable of providing a printing device capable of supplying a printing unit from the first sheet at high speed and accurately at the start of printing by using a feeder board that operates at high speed. can do.

It is a block diagram which shows the schematic structure of the printing apparatus according to 1st Embodiment. It is a block diagram which shows the structure of the control system of a printing apparatus. It is a flowchart for demonstrating operation of a printing apparatus. It is a time chart for explaining the operation of a printing apparatus. It is a block diagram which shows the schematic structure of the printing apparatus by 1st reference example . It is a block diagram which shows the structure of a compressed air supply system and a suction system. It is a side view for demonstrating the paper tail Sabaki device and the blow foot. It is a top view for demonstrating the paper tail Sabaki device and the blow foot. It is a block diagram for demonstrating the structure of the control system of a printing apparatus. It is a flowchart for demonstrating operation of a printing apparatus. It is a time chart for explaining the operation of a printing apparatus. It is a block diagram which shows the schematic structure of the printing apparatus according to 2nd Embodiment. It is a block diagram which shows the structure of the control system of a printing apparatus. It is a block diagram for demonstrating the structure of a feeder board. It is sectional drawing which shows the structure of the atmosphere opening valve. It is a top view which shows the structure of a feeder board. FIG. 16 is drawn with a part of the transport belt broken. It is a flowchart for demonstrating operation of a printing apparatus. It is a time chart for explaining the operation of a printing apparatus. It is a block diagram which shows the schematic structure of the printing apparatus by the 2nd reference example . It is a block diagram which shows the schematic structure of the printing apparatus by the 3rd reference example . It is a block diagram which shows the schematic structure of the printing apparatus according to 3rd Embodiment. It is a block diagram which shows the schematic structure of the printing apparatus by the 4th reference example .

<First Embodiment>
Hereinafter, an embodiment of the printing apparatus according to the present invention will be described in detail with reference to FIGS. 1 to 4. The printing apparatus according to this embodiment is the printing apparatus according to the invention according to claim 1.
The printing device 1 shown in FIG. 1 is an offset printing device having a supply unit 2 located on the right side in FIG. 1 and a printing unit 4 for printing on a sheet 3 supplied from the supply unit 2.

The supply unit 2 is taken out by a feeder pile 5 in which a large number of sheets 3 are stacked, a soccer device 6 that takes out the sheet 3 located at the top of the sheets 3 on the feeder pile 5, and the soccer device 6. A feeder board 7 or the like for transporting the sheet 3 to the printing unit 4 is provided, and the sheet 3 is supplied to the printing unit 4 one by one.
The soccer device 6 is connected to the drive device 11 for the supply unit and the suction device 12 for the soccer device, and sucks the sheets 3 on the feeder pile 5 one by one from the top to the feed roller 13 on the feeder board 7 side. send.

The supply unit drive device 11 operates by using the supply unit drive motor 14 (see FIG. 2) as a power source, and operates in the supply unit 2 including the soccer device 6, the feeder board 7, the feed roller 13, and the like. Drive the parts of. The operation of the supply unit drive motor 14 is controlled by the control device 15 described later.
The supply unit drive motor 14 is provided with a first encoder 16 for detecting the phase of the supply unit 2. The first encoder 16 sends the detected value to the control device 15. In this embodiment, the supply unit drive motor 14 corresponds to the "supply unit drive means" in the present invention, and the first encoder 16 corresponds to the "supply unit phase detection means" in the present invention.

The feeder board 7 transports the sheet 3 by a rotating transport belt 21. The transport belt 21 is wound between the drive side pulley 22 and the driven side pulley 23. The drive-side pulley 22 is driven by the above-mentioned supply unit drive device 11. The transport belt 21 is provided with suction holes (not shown) including a large number of through holes, and forms a part of the wall of the negative pressure chamber (not shown). The negative pressure chamber is connected to the feeder board suction device 24 (see FIG. 2), and sucks air from the suction holes provided in the transport belt 21. Therefore, the sheet 3 sent to the feeder board 7 side by the soccer device 6 is attracted to the transfer belt 21 by being placed on the transfer belt 21, and is conveyed by the rotation of the transfer belt 21.

A front pad 25 is provided in the vicinity of the downstream end portion of the feeder board 7 in the sheet transport direction. The front pad 25 is for aligning the register of the sheet 3 in the transport direction. Although not shown, horizontal needles for adjusting the register in the width direction of the seat 3 are provided on both sides of the front pad 25. These front pads 25 and horizontal hands are driven by a printing unit driving device 31 of the printing unit 4 described later to adjust the register of the sheet 3 at a predetermined time.

The printing unit 4 is capable of high-speed printing at high speed. The printing unit 4 is configured by using a plurality of printing units with the printing unit 32 shown in FIG. 1 as one color. In FIG. 1, only the first printing unit 32, which is the first color of the printing unit 4, is drawn. Each printing unit is provided with an impression cylinder 33, a rubber cylinder 34, a plate cylinder 35, a transfer cylinder 36, and the like. The impression cylinder 33 and the transfer cylinder 36 are provided with a grip claw device (not shown) for holding and holding the seat 3.

A swing device 37 for passing the sheet 3 from the feeder board 7 to the impression cylinder 33 is provided between the impression cylinder 33 and the feeder board 7 of the first printing unit.
As the impression cylinder 33 of the other printing unit, the sheet 3 is passed from the cylinder 36 of the printing unit on the upstream side. The rubber cylinder 34 transfers the ink transferred from the plate cylinder 35 to the sheet 3 sandwiched between the plate cylinder 35 and the impression cylinder 33. Ink is supplied to the plate cylinder 35 from an ink supply device (not shown), and this ink is transferred to the rubber cylinder 34. The transfer cylinder 36 receives the printed sheet 3 and sends it to the printing unit on the downstream side. The transfer cylinder 36 located at the downstream end of the printing section 4 in the sheet transport direction feeds the sheet 3 to a sheet discharging section (not shown). The sheet discharging unit sequentially stacks the sheets 3 on the delivery pile and discharges the sheets. The member operating in the sheet ejection unit is driven by the printing unit driving device 31 in a state of being synchronized with each body of the printing unit 4.

The parts operating in the printing unit 4, including each body of the printing unit 4 and the swing device 37, are driven by the printing unit driving device 31. The printing unit driving device 31 operates using the printing unit driving motor 38 (see FIG. 2) as a power source. The operation of the printing unit drive motor 38 is controlled by the control device 15. The printing unit drive motor 38 is provided with a second encoder 39 for detecting the phase of the printing unit 4. The second encoder 39 sends the detected value to the control device 15. In this embodiment, the printing unit driving motor 38 corresponds to the "printing unit driving means" in the present invention, and the second encoder 39 corresponds to the "printing unit phase detecting means" in the present invention.

The print start switch 40 is connected to the control device 15, and the control operation is started when the print start switch 40 is operated. In this embodiment, the control device 15 corresponds to the "control means" in the present invention. By starting the control operation, the control device 15 controls the operations of the supply unit drive motor 14 and the printing unit drive motor 38 so that high-speed printing can be realized from the first sheet 3 at the time of printing. Here, the operation of the printing device 1 including the description of the configuration of the control device 15 will be described with reference to the flowchart shown in FIG. 3 and the time chart shown in FIG.

At the start of printing, the control device 15 executes the printing unit operation start step S1 of the flowchart shown in FIG. In the printing unit operation start step S1, the printing unit driving motor 38 starts rotating, and each body of the printing unit 4 and the swing device 37 start operating. At this time, the operation of the printing unit drive motor 38 is controlled by the control device 15 based on the output value of the second encoder 39. The rotation speed of the motor 38 gradually increases with a target of a predetermined rotation speed at the time of printing, and as shown in FIG. 4, gradually increases from the start of operation, and is predetermined when the printable time T1 is reached. A high printing speed V1 is reached. By operating at the printing speed V1, the printing unit 4 is in a state where the sheets can be printed one by one at a high printing cycle.

After the printing unit 4 starts the operation, the control device 15 waits until the time T2 (see FIG. 4) for starting the driving of the supply unit 2 is reached (step S2), and executes the supply unit operation start step S3. That is, in the time chart shown in FIG. 4, when the supply unit drive start time T2 is reached, the control device 15 rotates the supply unit drive motor 14 in accordance with the printing cycle of the printing unit 4. In order to match the supply unit start time T2 with the printing cycle of the printing unit 4, the output values of the first and second encoders 16 and 39 are used.

In the supply unit operation start step S3, at the suction transfer start time T3, which is a predetermined timing after the drive of the supply unit 2 is started, the control device 15 sucks the soccer device suction device 12 and the feeder board suction device 24. Start. When the suction device 12 is started while the supply unit drive motor 14 is rotating, the suction transfer by the soccer device 6 is started, and the seat 3 on the feeder pile 5 is taken out in order from the top by the soccer device 6. It is sent to the feeder board 7 side. The sheet 3 is further fed by the feeder board 7 toward the printing unit 4. When the soccer device 6 takes out the leading sheet 3, the two sheets 3 are not taken out at the same time because the operating speed is low. The supply unit drive start time T2 may be after the printable time T1 is reached .

After starting the operation of the supply unit 2, the control device 15 increases the drive speed of the supply unit 2 in the acceleration step S4. The drive speed of the supply unit 2 is controlled by the control device 15 and increases at a predetermined rate of increase. Therefore, as shown in FIG. 4, the driving speed of the supply unit 2 gradually increases.
The drive speed of the supply unit 2 reaches the maximum speed V2 before the time T4 required for the leading sheet 3 to reach the front contact 25 on the feeder board 7 side has elapsed. This maximum speed V2 is a speed corresponding to the printing speed V1 at the time of printing by the printing unit 4.

The control device 15 executes the synchronization step S5 when the operating speed of the supply unit 2 reaches the maximum speed V2, and synchronizes the operation of the supply unit 2 with the operation of the printing unit 4. Therefore, the supply unit 2 accelerates while starting the supply of the sheet 3 at a low speed, and when supplying the leading sheet 3 to the printing unit 4, the speed is the same as the driving speed (printing speed V1) of the printing unit 4. Driven by.

By controlling the operation of the supply unit 2 in this way by the control device 15, the leading sheet 3 is surely taken out by the supply unit 2 and sent to the printing unit 4. The leading sheet 3 is delivered from the feeder board 7 to the swing device 37 (supplied to the printing unit 4) in a state where the supply unit 2 is driven at the same speed as the driving speed of the printing unit 4. Further, when the first sheet 3 is supplied from the supply unit 2 to the printing unit 4, the supply unit 2 and the printing unit 4 are synchronized based on the output values of the first and second encoders 16 and 39. Therefore, the leading sheet 3 is correctly supplied from the supply unit 2 to the printing unit 4.
Therefore, according to this embodiment, it is possible to provide a printing apparatus capable of supplying the printing unit 4 from the leading sheet 3 at high speed and accurately.

In a conventional printing apparatus, since the printing unit and the supply unit are driven by one motor of the machine, the supply unit and the printing unit start operating at the same time when printing is started. In such a conventional printing apparatus, the driving speed of the printing unit reaches a predetermined printing speed between the time when the supply unit starts operation and the time when the first sheet is sent from the supply unit to the printing unit. It's difficult. The reason for this is that no high-power motor that can rapidly increase the speed of the printing unit is used as the motor of this machine, and if the speed is increased rapidly, the load applied to the printing unit becomes excessively large. ..

If printing is performed while the speed of the printing unit is being accelerated in a conventional printing apparatus, there is a high possibility that printing defects such as doubling will occur because a slight speed difference occurs between the cylinders. For this reason, all the sheets printed during acceleration are usually spoiled paper.
In order to prevent printing from being performed during speed increase in this way, suction is started in the soccer device of the supply unit to start supplying the sheet while the supply unit and the printing unit are operating at high speed. Can be considered. However, if this is done, there will be a problem in the stability of the transfer, and the transfer will often be poor. The reason why the transportation becomes unstable is that the soccer device feeds the second sheet together with the first sheet, or the first sheet slips on the feeder board.

According to the printing apparatus 1 according to this embodiment, the supply unit 2 is driven independently, the sheet 3 can be reliably taken out at a low speed, and printing is performed when the printing unit 4 is driven at the printing speed V1. Since it can be supplied to the unit 4, it is possible to prevent the spoiled paper from being generated at the start of printing.

< First reference example >
Reference techniques for the printing apparatus according to the present invention will be described with reference to FIGS. 5 to 11 . In these figures, the same or equivalent members as those described with reference to FIGS. 1 to 4 are designated by the same reference numerals, and detailed description thereof will be omitted as appropriate.

The printing device 101 shown in FIG. 5 is an offset printing device having a supply unit 2 located on the right side in FIG. 5 and a printing unit 4 for printing on a sheet 3 supplied from the supply unit 2.
The supply unit 2 of the printing device 1 according to this reference example includes a feeder pile 5 on which a large number of sheets 3 are stacked, a soccer device 6 that takes out the sheet 3 located at the top of the sheets 3 on the feeder pile 5, and a soccer device 6. A feeder board 7 that conveys the sheet 3 taken out by the soccer device 6 to the printing unit 4, a paper tail shaving device 102 that blows compressed air onto the sheet 3 on the feeder pile 5, a horizontal shaving device 103, a blowing foot 104, and the like. The sheet 3 is supplied to the printing unit 4 one by one.

The soccer device 6 includes a first suction member 105 that moves up and down, and a second suction member 106 that slides in the seat transport direction. The first suction member 105 and the second suction member 106 are driven by the drive device 111 of the printing device 1 to repeat a predetermined operation. The first suction member 105 moves up and down between the suction position shown by the alternate long and short dash line in FIG. 7 and the ascending position shown by the solid line.
The drive device 111 drives all the parts that operate during printing in the printing device 101, and operates by using the machine motor 112 (see FIG. 9) as a power source. The operation of the motor 112 of this machine is controlled by the control device 113 described later.

The first suction member 105 and the second suction member 106 are connected to the suction device 115 (see FIG. 6) via a timing valve 114. The timing valve 114 defines the time when the first suction member 105 and the second suction member 106 are connected to the suction device 115, although the details will be described later. As shown in FIG. 6, the suction device 115 includes an air suction pump 116 and a soccer valve 117 provided between the suction port of the pump 116 and the timing valve 114. The soccer valve 117 is composed of an on-off valve that can be operated remotely. The operations of the air suction pump 116 and the soccer valve 117 are controlled by the control device 113.

The suction device 115 communicates with the first suction member 105 via the timing valve 114, so that the first suction member 105 sucks air. As the first suction member 105 descends while sucking air, the sheet 3 located at the top on the feeder pile 5 is attracted to the first suction member 105. Then, by raising the first suction member 105 in this state, the uppermost sheet 3 is pulled up.

By communicating the suction device 115 with the second suction member 106 via the timing valve 114, the seat 3 pulled up by the first suction member 105 is attracted to the second suction member 106. Then, when the suction of the first suction member 105 is completed, the second suction member 106 slides toward the downstream side in the sheet transport direction, so that the sheet 3 is fed between the pair of feed rollers 13. The feed roller 13 according to this reference example is driven by the drive device 111 and rotates.

The feeder board 7 transports the seat 3 by a rotating transport belt 21, and only the configuration of the drive system is different from that shown in FIG. The drive-side pulley 22 of the feeder board 7 is driven by the drive device 111 described above to rotate.

As shown in FIG. 7, the paper tail shaving device 102 blows compressed air from the upstream side in the transport direction to a plurality of sheets 3 located at the uppermost part on the feeder pile 5, and blows air between the sheets 3. It is for handling the sheet 3 with. As shown in FIG. 8, the paper tail shaving device 102 according to this reference example includes a plurality of air nozzles 102a arranged at predetermined intervals in the width direction of the sheet 3, in other words, the horizontal direction orthogonal to the sheet transport direction. There is.

In order for the supply unit 2 to supply at high speed from the leading sheet 3, it is necessary to start the supply by the soccer device 6 in a state where the sheet 3 is sufficiently separated. However, in the conventional printing device, a valve for opening and closing the compressed air passage supplied to the paper tail sabaki device and a valve for opening and closing the suction air passage of the soccer device are interlocked as one valve device. .. Therefore, the compressed air can be supplied to the paper tail sabaki device only at the same time as the suction by the soccer device is started.

The details of the printing device 101 according to this reference example will be described later, but in order to solve such a problem, the compressed air is supplied to the paper tail sabaki device 102, and the first suction member 105 and the first suction member 105 of the soccer device 6 2 A configuration is adopted in which air is sucked from the suction member 106 individually.
The paper tail sabaki device 102 is connected to the compressed air supply device 121 (see FIG. 6) together with the blow foot 104 via the timing valve 114.
As shown in FIG. 7, the blow foot 104 is located higher than the uppermost sheet 3 and blows compressed air from the upstream side in the sheet transport direction below the sheet 3 pulled up by the first suction member 105. Is.

The blow foot 104 according to this reference example is arranged at a position corresponding to the central portion in the width direction of the sheet 3, and as shown by an arrow in FIG. 8, the compressed air is within a predetermined width in the width direction of the sheet 3. It is configured to blow out.
As shown in FIG. 6, the compressed air supply device 121 includes a compressed air supply pump 122 and a sabaki valve 123 provided between the discharge port of the pump 122 and the timing valve 114. The Sabaki valve 123 is composed of an on-off valve that can be remotely controlled. The operations of the compressed air supply pump 122 and the Sabaki valve 123 are controlled by the control device 113.

The lateral sabaki device 103 is for blowing compressed air on both sides in the width direction of the uppermost sheet 3 on the feeder pile 5 and blowing air between the sheets 3 at a predetermined interval in the sheet transport direction. It is equipped with multiple air nozzles (not shown) lined up side by side. As shown in FIG. 6, the lateral sabaki device 103 is connected to the compressed air supply device 121 without passing through the timing valve 114.

Although not shown in detail, the timing valve 114 includes a columnar valve body and a housing that accommodates and rotatably supports the valve body. The valve body is driven by the driving device 111 and rotates in synchronization with the soccer device 6. A plurality of concave grooves extending in the circumferential direction are formed on the outer peripheral portion of the valve body in a state of being separated from each other in the axial direction of the valve body. These concave grooves form a part of the air passage opened and closed by the timing valve 114, and are formed as shown in FIG. 6 when expanded.

The plurality of concave grooves provided in the valve body are the concave groove 124 for the paper tail sabaki device, the concave groove 125 for the blow foot, the concave groove 126 for the first suction member, and the concave groove 127 for the second suction member. Is. These recessed grooves 124 to 127 are arranged in the circumferential direction of the valve body in accordance with the operation timing.

The concave groove 124 for the paper tail sabaki device defines the time when the compressed air is blown out from the paper tail sabaki device 102, and communicates the sabaki valve side port 124a provided in the housing with the paper tail sabaki device side port 124b. The recessed groove 125 for the blowing foot defines the time when the compressed air is blown out from the blowing foot 104, and communicates the Sabaki valve side port 125a provided in the housing with the blowing foot side port 125b. The recessed groove 126 for the first suction member defines the time when air is sucked from the first suction member 105, and communicates the soccer valve side port 126a provided in the housing with the first suction member side port 126b.

The recessed groove 127 for the second suction member defines the time when air is sucked from the second suction member 106, and communicates the soccer valve side port 127a and the second suction member side port 127b provided in the housing. In this reference example , the valve body rotates with the soccer valve 117 and the sabaki valve 123 open, so that air is sucked from the first suction member 105 after the compressed air is supplied to the paper tail sabaki device 102. Just before the suction of the first suction member 105 is stopped, the compressed air is blown out from the blowing foot 104 and the air is sucked from the second suction member 106.

The printing unit 4 according to this reference example differs from the printing unit 4 shown in FIG. 1 only in the configuration of the drive system. The printing unit 4 according to this reference example is driven by the driving device 111 and operates. In this reference example , the sheet ejection unit to which the printed sheet 3 is sent from the printing unit 4 is also driven by the drive device 111 to operate.
The drive device 111 includes an encoder 128 (see FIG. 9) for detecting the drive speed of the printing unit 4.

As shown in FIG. 9, the control device 113 is connected to the print start switch 40, and starts the control operation when the print start switch 40 is operated. The control device 113 controls the operations of the pumps and valves of the motor 112 of the machine and the supply unit 2 so that high-speed printing can be realized from the first sheet 3 at the time of printing. Here, the operation of the printing device 101 including the description of the configuration of the control device 113 will be described with reference to the flowchart shown in FIG. 10 and the time chart shown in FIG.

When the print start switch 40 is operated, the control device 113 executes the drive start step S11 shown in the flowchart of FIG. 10 to start the operation of the motor 112 of the machine. By rotating the motor 112 of the machine, the soccer device 6 and the feeder board 7 of the printing unit 4 operate without the transfer of the sheet 3, and the printing unit 4 and the sheet discharging unit operate in the same manner as during printing. The rotation speed of the motor 112 of the machine is controlled by the control device 113 and increases to a rotation speed at which high-speed printing is possible at a predetermined increase rate.

Next, in the compressed air supply start step S12, the control device 113 starts the operation of the compressed air supply pump 122 and opens the Sabaki valve 123. By opening the sabaki valve 123 while the compressed air supply pump 122 is operating, compressed air is supplied to the lateral sabaki device 103, and compressed air is blown to the uppermost seat 3 from both sides in the width direction. At the same time, compressed air is supplied to the timing valve side ports 124a and 125a of the timing valve 114, and the compressed air is supplied to the paper tail sabaki device 102 through the recessed groove 124 for the sabaki device as the timing valve 114 operates. At the same time, compressed air is supplied to the blowing foot 104 through the concave groove 125 for the blowing foot.

For this reason, compressed air is blown onto the uppermost sheet 3 on the feeder pile 5 by the horizontal shaving device 103 and the paper tail shaving device 102, so that so-called "judgment" is performed. These paper tail sabaki device 102, horizontal sabaki device 103, and blow foot 104 operate as shown in the timing chart of FIG. That is, the lateral sabaki device 103 starts operating at the compressed air supply start time T11 in FIG. 11, and the paper tail sabaki device 102 operates at the operation start time T12 defined by the paper tail sabaki concave groove 124 of the timing valve 114. To start. After that, the blow foot 104 starts the operation at the operation start time T13 defined by the blow foot concave groove 125 of the timing valve 114.

The control device 113 starts the operation of the air suction pump 116 in the suction start step S13 after a predetermined time has elapsed from the execution of the step S12, and opens the soccer valve 117. When the soccer valve 117 is opened while the air suction pump 116 is operating, the time specified by the concave groove 126 for the first suction member of the timing valve 114 (the first suction start time of the timing chart shown in FIG. 11). In T14), air is sucked from the first suction member 105, and the first sheet 3 is pulled up by the first suction member 105. Immediately after that, compressed air is blown out from the blown foot 104.

Then, air is sucked from the second suction member 106 at the time defined by the recessed groove 127 for the second suction member of the timing valve 114 (the second suction start time T15 of the timing chart shown in FIG. 11), and the leading sheet 3 is attracted to the second suction member 106 and sent to the feeder board 7 side. After the suction by the second suction member 106 is stopped, the paper tail sabaki device 102, the first suction member 105, the blow foot 104, and the second suction member 106 repeatedly operate in this order to perform the second and subsequent sheets. Sheet 3 is sequentially supplied. That is, the timing valve 114 sucks the first suction member 105 and the second suction member 106 before the suction of the first suction member 105 and the second suction member 106 is started by the lateral sabaki device 103 and the blowing foot 104. Compressed air is blown out at the same timing as when the first suction member 105 and the second suction member 106 are sucked, and then the compressed air is blown out according to the suction timing of the first suction member 105 and the second suction member 106. , Can perform sheet handling operation.

In the printing apparatus 101 according to this reference example , the Sabaki valve 123 opens before the soccer valve 117 opens when the supply unit 2 starts the transfer of the leading sheet 3. That is, compressed air is blown to the upper sheet 3 on the feeder pile 5, and the suction and transfer by the soccer device 6 are started in a state where the upper sheet 3 is sufficiently separated. Therefore, while the soccer device 6 is operating at high speed, only one sheet 3 at the head is surely taken out by the soccer device 6.
Therefore, according to this reference example , it is possible to provide a printing apparatus capable of supplying the printing unit 4 from the leading sheet 3 at high speed and accurately.

The horizontal shaving device 103 according to this reference example is connected to the compressed air supply device 121 without passing through the timing valve 114. Therefore, the timing at which the horizontal sabaki device 103 starts blowing compressed air can be freely set. As shown in this reference example , by starting the blowing of the compressed air by the horizontal shaving device 103 before the supply of the seat 3 by the soccer device 6 is started, the seat 3 can be sufficiently separated. Even though the soccer device 6 starts sucking while operating at high speed, the first sheet 3 can be reliably taken out.

The compressed air supply device 121 according to this reference example is configured to supply compressed air from one compressed air supply pump 122 to the paper tail sabaki device 102 and the blow foot 104. Therefore, the manufacturing cost can be kept low as compared with the case where the compressed air is supplied to the paper tail sabaki device 102 and the blowing foot 104 from the dedicated compressed air supply pumps.

Further, in this reference example , by dividing the conventional air valve in which the suction passage opening / closing part and the compressed air passage opening / closing part are integrally provided into the soccer valve 117 and the Sabaki valve 123, only the compressed air supply operation is performed. The configuration is such that it can be performed in advance before the start of paper feeding. Therefore, since it is possible to sufficiently handle the sheet 3 with a simple configuration, it is possible to realize a printing device capable of taking out the sheet 3 from the first sheet at high speed while suppressing an increase in cost.

< Second Embodiment>
The printing apparatus according to the present invention can be configured as shown in FIGS. 12 to 18. In these figures, the same or equivalent members as those described with reference to FIGS. 1 to 11 are designated by the same reference numerals, and detailed description thereof will be omitted as appropriate. The printing apparatus according to this embodiment is the printing apparatus according to the invention according to claim 2 .
The printing device 201 shown in FIG. 12 is an offset printing device having a supply unit 2 located on the right side in FIG. 12 and a printing unit 4 for printing on the sheet 3 supplied from the supply unit 2.

The supply unit 2 of the printing device 201 according to this embodiment includes a feeder pile 5 on which a large number of sheets 3 are stacked, and a soccer device 6 that takes out the sheet 3 located at the top of the sheets 3 on the feeder pile 5. A feeder board 7 or the like for transporting the sheet 3 taken out by the soccer device 6 to the printing unit 4 is provided, and the sheet 3 is supplied to the printing unit 4 one by one.

The soccer device 6 is connected to the drive device 111 of the printing device 201 and the suction device 12 for the soccer device, and sucks the sheets 3 on the feeder pile 5 one by one from the top to feed the feeder 13 on the feeder boat side. Send to. The drive device 111 operates by using the machine motor 112 (see FIG. 13) as a power source, and drives all the parts that operate at the time of printing in the printing device 201 including the supply unit 2 and the printing unit 4. The operation of the machine motor 112 and the soccer device suction device 12 is controlled by the control device 202 (see FIG. 13) described later. The drive device 111 according to this embodiment includes a first encoder 16 for detecting the phase of the supply unit 2 and a second encoder 39 for detecting the phase of the printing unit 4. These first and second encoders 16 and 39 send the detected value to the control device 202.

As shown in FIG. 14, the feeder board 7 includes a transport belt 21 for transporting sheets. The transport belt 21 is wound between the drive side pulley 22 and the driven side pulley 23, and is driven by the drive side pulley 22 to rotate. The drive side pulley 22 is driven by the drive device 111 described above.
Between the drive side pulley 22 and the driven side pulley 23, the first to fourth suction chambers 211 to 214 are provided in a state of being lined up in a row in the seat transport direction. These first to fourth suction chambers 211 to 214 constitute the "suction area divided into a plurality of parts" in the present invention, and are formed in a box shape that opens only upward. As shown in FIG. 16, the openings of the first to fourth suction chambers 211 to 214 are formed by a plurality of suction holes 215. The above-mentioned transport belt 21 is arranged at a position that closes these suction holes 215 from above. The transport belt 21 is provided with suction holes 216 including a large number of through holes.

Of the first to fourth suction chambers 211 to 214, the first and second suction chambers 211 and 212 located on the upstream side in the sheet transport direction are the upstream suction hose 221 as shown in FIG. , 222 is connected to an air suction portion (not shown) of the upstream suction blower 223 (see FIG. 13). The third and fourth suction chambers 213 and 214 are connected to the air suction portion 226a of the downstream suction blower 226 via the downstream suction hoses 224 and 225, respectively. As shown in FIG. 14, the upstream suction blower 223 and the downstream suction blower 226 are arranged below the feeder board 7 and are supported by a frame (not shown) of the supply unit 2.

The upstream suction blower 223 and the downstream suction blower 226 operate to suck air from the suction hoses 221, 222, 224, and 225. By sucking air from the suction hose in this way, the inside of the first to fourth suction chambers 211 to 214 becomes negative pressure. The negative pressure of the first to fourth suction chambers 211 to 214 increases when the suction holes 215 are closed by the transport belt 21 and the sheet 3. Therefore, when the sheet 3 is placed on the transfer belt 21, the negative pressure of the first to fourth suction chambers 211 to 214 rises, and the sheet 3 is attracted to the transfer belt 21. The sheet 3 is conveyed to the tip area of the feeder board 7 by moving the transfer belt 21 in a state of being attracted to the transfer belt 21 in this way. The tip area referred to here is an end portion of the feeder board 7 on the downstream side in the transport direction, and is a portion of the feeder board close to the front pad 25.

When the leading sheet 3 is sent to the feeder board 7, the first to fourth suction chambers 211 to 214 are in a state where the downstream side in the transport direction from the sheet 3 is open to the atmosphere. For this reason, in the feeder board of the conventional printing device, if the rotation speed of the transfer belt is faster than the transfer speed of the general feed board at the rotation speed at the time of high-speed printing, the first to fourth suctions are performed. The rise in negative pressure in the chamber tends to be delayed. If the increase in negative pressure is delayed in this way, the tip of the sheet (downstream end in the sheet transport direction) cannot hit the front pad correctly, and the register of the sheet cannot be adjusted correctly by the front pad.

In order to solve such a problem in the feeder board 7 according to this embodiment, it is conceivable to increase the output of the downstream suction blower 226 connected to the tip area of the feeder board 7 higher than usual. However, if this configuration is adopted, the suction force of the leading sheet 3 increases, but the suction force cannot be decreased instantaneously. Therefore, the suction force of the second sheet 3 increases too much this time, and 2 The first sheet 3 causes a transfer failure due to the transfer force of the transfer belt 21.

In this embodiment, the downstream suction blower 226 has a higher output than the upstream suction blower 223 and has a higher output than usual, and the suction force of the sheet 3 is applied to the downstream portion of the feeder board 7 in the transport direction. The suction system of the downstream suction blower 226 is provided with an air release valve 231 in order to adopt a rising structure and reduce the suction force for the second and subsequent seats 3.

As shown in FIG. 15, the atmosphere release valve 231 has a disk-shaped valve body 233 facing the opening at one end of the suction pipe 232 and an air cylinder that brings the valve body 233 into contact with and separates from one end of the suction pipe 232. It is equipped with 234. When the valve body 233 is separated from the opening at one end of the suction pipe 232, the atmosphere release valve 231 is opened and one end of the suction pipe 232 is opened to the atmosphere. The operation of the air cylinder 234 is controlled by the control device 202.

As shown in FIG. 14, the other end of the suction pipe 232 is connected to the air suction portion 226a of the downstream suction blower 226. Therefore, when the air release valve 231 is opened, one end of the suction pipe 232 is opened to the atmosphere, and the negative pressure of the air suction portion 226a of the downstream suction blower 226 is reduced. Along with this decrease in negative pressure, the negative pressures in the third and fourth suction chambers 213 and 214 also decrease.
The negative pressure of the third and fourth suction chambers 213, 214 with the air release valve 231 open is a suction suitable for transporting the second sheet 3 and the subsequent sheets 3 by the transfer belt 21. It is a negative pressure that creates a force.

A register timing valve 235 is connected to the fourth suction chamber 214 in addition to the downstream suction blower 226. Although not shown in detail, the register timing valve 235 has a basic structure equivalent to that of the atmospheric release valve 231 described above, and is driven by an air cylinder 236 (see FIG. 13) to operate. The operation of the air cylinder 236 is controlled by the control device 202. The register timing valve 235 opens at the timing when the seat 3 comes into contact with the front pad 25 to reduce the negative pressure of the fourth suction chamber 214, and closes immediately after the seat 3 is delivered to the swing device 37. The negative pressure of the suction chamber 214 of 4 is restored. When the negative pressure of the fourth suction chamber 214 is reduced by the register timing valve 235, the seat 3 is easily moved when the seat 3 hits the front pad 25 and is registered, so that the register adjustment can be performed with high accuracy. Become.

As shown in FIG. 13, the control device 202 is connected to the print start switch 40, and starts the control operation when the print start switch 40 is operated. The control device 202 operates the machine motor 112 so that high-speed printing is realized from the first sheet 3 at the time of printing, and operates the supply unit 2 and the printing unit 4 at a driving speed capable of high-speed printing. Here, the operation of the printing device 201 including the description of the configuration of the control device 202 will be described with reference to the flowchart shown in FIG. 17 and the time chart shown in FIG.

When the print start switch 40 is operated, the control device 202 executes the drive start step S21 shown in the flowchart of FIG. 17 and starts the operation of the machine motor 112. By rotating the motor 112 of the machine, the soccer device 6 and the feeder board 7 of the printing unit 4 operate without the transfer of the sheet 3, and the printing unit 4 and the sheet discharging unit operate in the same manner as during printing. The rotation speed of the motor 112 of the machine is controlled by the control device 202 and increases to a rotation speed at which high-speed printing is possible at a predetermined increase rate.

After that, the control device 202 starts the operation of the soccer device suction device 12 in the soccer device suction start step S22, and then in the suction blower suction start step S23, the upstream side suction blower 223 and the downstream side suction blower 226. Start the operation of. Then, the control device 202 closes the atmosphere opening valve 231 and the register timing valve 235 in the atmosphere opening stop step S24 with the start of these blowers. That is, in the timing chart of FIG. 18, the supply of the seat 3 is started at the seat supply start time T21, and both blowers start the operation at the blower start time T22. When the downstream suction blower 226 starts operating and the atmosphere release valve 231 and the register timing valve 235 are closed, a relatively large negative pressure is generated in the third and fourth suction chambers 213 and 214.

The sheet 3 sent to the feeder board 7 is attracted to the transport belt 21 and moves together with the transport belt 21 that rotates at a speed capable of printing at high speed. At this time, since the negative pressures of the third and fourth suction chambers 213 and 214 are relatively high, even the first sheet 3 is reliably conveyed and correctly abuts on the front pad 25. It is correctly delivered to the swing device 37.

In the first determination step S25, the control device 202 detects the time when the second sheet 3 comes into contact with the front contact 25 based on the detection value of the first encoder 16, and at this time, the atmospheric release valve 231 and Open the register timing valve 235. That is, in the timing chart of FIG. 18, the atmosphere opening valve 231 and the register timing valve 235 open at the atmosphere opening time T23, and the negative pressure of the fourth suction chamber 214 rapidly decreases accordingly.

After that, the control device 202 waits until the second sheet 3 is handed over from the feeder board 7 to the swing device 37 in the second determination step S26, and closes the register timing valve 235 in the negative pressure increase step S27. That is, in the timing chart of FIG. 18, the register timing valve 235 closes at the negative pressure rise time T24, and the negative pressure of the fourth suction chamber 214 rises. The negative pressure at this time is equivalent to the negative pressure of the first and second suction chambers 211 and 212.

Next, in the third determination step S28, the control device 202 determines whether or not the next sheet 3 has come into contact with the front pad 25. If the next sheet 3 is not in contact with the front pad 25, the process proceeds to the fourth determination step S29 to determine whether or not printing is completed. When printing is completed, the control device 202 stops the operation of the printing device 201. On the other hand, if the printing is not completed, the process returns to the third determination step S28, and when the next sheet 3 comes into contact with the front contact 25, the negative pressure lowering step S30 is performed.

In the negative pressure drop step S30, the control device 202 opens the register timing valve 235. That is, in the timing chart of FIG. 18, the register timing valve 235 opens at the negative pressure drop timing T25, and the negative pressure of the fourth suction chamber 214 drops. After that, the control device 202 returns to the second determination step S26, and repeats the control operation described above. As a result, the register timing valve 235 opens when the seat 3 comes into contact with the front pad 25, and the register timing valve 235 closes when the sheet 3 is handed over to the swing device 37, which is repeated until the end of printing.

According to the printing apparatus 201 according to this embodiment, when the first sheet 3 reaches the tip suction area and the second sheet 3 reaches the tip suction area with the atmosphere release valve 231 closed, the atmosphere release valve 231 opens. Therefore, according to this embodiment, the leading sheet 3 is conveyed by the feeder board 7 in a state of high suction force, and the second and subsequent sheets 3 are conveyed so that the register adjustment is correctly performed in the tip suction area. can do. Therefore, according to the present invention, it is possible to provide a printing device capable of supplying the printing unit 4 from the leading sheet 3 at high speed and accurately by using the feeder board 7 that operates at high speed.

In this embodiment, the atmosphere release valve 231 and the register timing valve 235 are controlled to operate based on the rotation phase of the supply unit 2 (based on the output value of the first encoder 16). However, these atmospheric release valves 231 and timing valves 235 may operate based on the rotation phase of the printing unit 4.

< Second reference example >
A reference technique of the printing apparatus according to the present invention will be described with reference to FIG. 19, the same or equivalent members as those described by FIGS. 18, suitable omitted Yibin subjected detailed description the same reference numerals.
The printing device 301 shown in FIG. 19 includes a supply unit drive device 11 for driving the supply unit 2 and a printing unit drive device 31 for driving the printing unit 4. The operations of these drive devices 11 and 31 are individually controlled by the control device 302.

The drive device 11 for the supply unit operates the supply unit 2 at a low speed at the start of printing, and gradually increases the drive speed to a drive speed at which high-speed printing is possible. The printing unit drive device 31 operates the printing unit 4 at a driving speed capable of high-speed printing from the start of printing.

The supply unit 2 is the same as that shown in the first reference example , and includes a feeder pile 5, a soccer device 6, a feeder board 7, a paper tail sabaki device 102, a horizontal sabaki device 103, and a blown foot 104. And so on. The soccer device 6 is connected to the suction device 115 via a timing valve 114.

The paper tail sabaki device 102 and the blow foot 104 are connected to the compressed air supply device 121 via a timing valve 114. The lateral sabaki device 103 is connected to the compressed air supply device 121 without passing through the timing valve 114.
The suction device 115 includes an air suction pump 116 and a soccer valve 117. The compressed air supply device 121 is composed of a compressed air supply pump 122 and a Sabaki valve 123. The operation of the suction device 115 and the operation of the compressed air supply device 121 are individually controlled by the control device 302.

The control device 302 according to this reference example operates the compressed air supply device 121 before the supply of the seat 3 is started in the soccer device 6. That is, the Sabaki valve 123 opens before the soccer valve 117 opens, and the upper seat 3 of the seats 3 loaded on the feeder pile 5 is sufficiently separated, and the soccer device 6 operates at a low speed. The sheet 3 is taken out.

When the leading sheet 3 is supplied to the printing unit 4, the supply unit 2 operates at the same speed as the printing unit 4 and operates in synchronization with the printing unit 4. Therefore, according to this reference example, it is possible to more reliably supply the leading sheet 3 to the printing unit 4 that operates at high speed.

< Third reference example >
A reference technique of the printing apparatus according to the present invention will be described with reference to FIG . In FIG. 20, the same or equivalent members as those described with reference to FIGS. 1 to 19 are designated by the same reference numerals, and detailed description thereof will be omitted as appropriate.
The printing device 401 shown in FIG. 20 includes a supply unit drive device 11 for driving the supply unit 2 and a printing unit drive device 31 for driving the printing unit 4. The operations of these drive devices 11 and 31 are individually controlled by the control device 402.

The drive device 11 for the supply unit operates the supply unit 2 at a low speed at the start of printing, and gradually increases the drive speed to a drive speed at which high-speed printing is possible. The printing unit drive device 31 is operated at a driving speed capable of high-speed printing from the start of printing.

The supply unit 2 includes a feeder pile 5, a soccer device 6, a feeder board 7, a paper tail shaving device 102, a horizontal shaving device 103, a blowing foot 104, and the like. Among these devices, the feeder pile 5, the soccer device 6, the paper tail sabaki device 102, the horizontal sabaki device 103, and the blown foot 104 are the same as those shown in the first reference example . That is, the soccer device 6 is connected to the suction device 115 via the timing valve 114.

The paper tail sabaki device 102 and the blow foot 104 are connected to the compressed air supply device 121 via a timing valve 114. The lateral sabaki device 103 is connected to the compressed air supply device 121 without passing through the timing valve 114.
The suction device 115 includes an air suction pump 116 and a soccer valve 117. The compressed air supply device 121 is composed of a compressed air supply pump 122 and a Sabaki valve 123. The operation of the suction device 115 and the operation of the compressed air supply device 121 are individually controlled by the control device 402.

The feeder board 7 is the same as that shown in the second embodiment . That is, the feeder board 7 transports the seat 3 by the transport belt 21, and the first to fourth suction chambers 211 are between the drive side pulley 22 on which the transport belt 21 is wound and the driven side pulley 23. It is equipped with ~ 214. The drive-side pulley 22 is driven by the supply unit drive device 11 to rotate.

The first to fourth suction chambers 211 to 214 have suction holes (not shown) covered by the transport belt 21. The transport belt 21 has a large number of suction holes (not shown).
The first and second suction chambers 211 and 212 are connected to an air suction portion of an upstream suction blower (not shown). The third and fourth suction chambers 213 and 214 are connected to the air suction portion 226a of the downstream suction blower 226.

An air release valve 231 is connected to the air suction portion 226a of the downstream suction blower 226. A register timing valve 235 is connected to the fourth suction chamber 214.
The operation of the upstream suction blower, the operation of the downstream suction blower 226, the operation of the atmosphere release valve 231 and the operation of the register timing valve 235 are controlled by the control device 402.

The control device 402 according to this reference example operates the compressed air supply device 121 before the supply of the seat 3 is started. That is, the Sabaki valve 123 opens before the soccer valve 117 opens, and the upper seat 3 of the seats 3 loaded on the feeder pile 5 is sufficiently separated, and the soccer device 6 operates at a low speed. The sheet 3 is taken out.

The leading sheet 3 is fed to the feeder board 7, is attracted to the transport belt 21, and is transported. At this time, the control device 402 operates the upstream suction blower and the downstream suction blower 226, and closes the atmosphere release valve 231 and the register timing valve 235. Further, the control device 402 opens the atmosphere release valve 231 and the register timing valve 235 when the second seat 3 reaches the tip suction area. The air release valve 231 is kept open thereafter. After that, the register timing valve 235 repeats the operation of closing when the seat 3 is passed to the swing device 37 and opening when the next seat 3 reaches the tip suction area.

Therefore, according to this reference example , the leading sheet 3 is conveyed by the feeder board 7 in a state of high suction force, and the second and subsequent sheets 3 are conveyed so that the register adjustment is correctly performed in the tip suction area. be able to.
When the leading sheet 3 is supplied to the printing unit 4, the control device 402 operates the supply unit 2 so as to synchronize with the printing unit 4 at the same speed.

Therefore, according to this reference example , the leading sheet 3 can be reliably taken out by the soccer device 6, and the examination adjustment by the front contact 25 can be performed with high accuracy on the leading sheet 3 and the subsequent sheets 3. Therefore, it is possible to provide a printing apparatus capable of high-speed printing from the first sheet 3.

< Third embodiment>
The printing apparatus according to the present invention can be configured as shown in FIG. In FIG. 21, the same or equivalent members as those described with reference to FIGS. 1 to 20 are designated by the same reference numerals, and detailed description thereof will be omitted as appropriate.
The printing apparatus according to this embodiment is the printing apparatus according to the invention according to claim 3 .
The printing device 501 shown in FIG. 21 includes a supply unit drive device 11 for driving the supply unit 2 and a printing unit drive device 31 for driving the printing unit 4. The operations of these drive devices 11 and 31 are individually controlled by the control device 502.

The drive device 11 for the supply unit operates the supply unit 2 at a low speed at the start of printing, and gradually increases the drive speed to a drive speed at which high-speed printing is possible. The printing unit drive device 31 operates the printing unit 4 at a driving speed capable of high-speed printing from the start of printing.

The supply unit 2 includes a feeder pile 5, a soccer device 6, a feeder board 7, and the like. The feeder pile 5 and the soccer device 6 are equivalent to those shown in the first embodiment. The soccer device 6 is connected to the supply unit drive device 11 and the soccer device suction device 12.
The feeder board 7 is the same as that shown in the second reference example . That is, the feeder board 7 transports the seat 3 by the transport belt 21, and the first to fourth suction chambers 211 are between the drive side pulley 22 on which the transport belt 21 is wound and the driven side pulley 23. It is equipped with ~ 214. The drive-side pulley 22 is driven by the supply unit drive device 11 to rotate.

The first to fourth suction chambers 211 to 214 have suction holes (not shown) covered by the transport belt 21. The transport belt 21 has a large number of suction holes (not shown).
The first and second suction chambers 211 and 212 are connected to an air suction portion of an upstream suction blower (not shown). The third and fourth suction chambers 213 and 214 are connected to the air suction portion 226a of the downstream suction blower 226. An air release valve 231 is connected to the air suction portion 226a of the downstream suction blower 226. A register timing valve 235 is connected to the fourth suction chamber 214.
The operation of the upstream suction blower, the operation of the downstream suction blower 226, the operation of the atmosphere release valve 231 and the operation of the register timing valve 235 are controlled by the control device 502.

The control device 502 operates the soccer device 6 at a low speed when the supply of the seat 3 is started. The leading sheet 3 taken out from the feeder pile 5 by the soccer device 6 is sent to the feeder board 7, is attracted to the transfer belt 21, and is conveyed. At this time, the control device 502 operates the upstream suction blower and the downstream suction blower 226, and keeps the atmosphere release valve 231 and the register timing valve 235 closed. Further, the control device 502 opens the atmosphere release valve 231 and the register timing valve 235 when the second seat 3 reaches the tip suction area. The air release valve 231 is kept open thereafter. After that, the register timing valve 235 repeats the operation of closing when the seat 3 is passed to the swing device 37 and opening when the next seat 3 reaches the tip suction area.

Therefore, according to this embodiment, the leading sheet 3 is conveyed by the feeder board 7 in a state of high suction force, and the second and subsequent sheets 3 are conveyed so that the register adjustment is correctly performed in the tip suction area. can do.
When the leading sheet 3 is supplied to the printing unit 4, the control device 502 operates the supply unit 2 so as to synchronize with the printing unit 4 at the same speed.

Therefore, according to this embodiment, the leading sheet 3 can be reliably taken out by the soccer device 6, and the examination and adjustment by the front contact 25 can be performed on the leading sheet 3 and the subsequent sheets 3 with high accuracy. Therefore, it is possible to provide a printing device capable of high-speed printing from the first sheet 3.

< Fourth reference example >
A reference technique of the printing apparatus according to the present invention will be described with reference to FIG. In FIG. 22, members that are the same as or equivalent to those described with reference to FIGS. 1 to 21 are designated by the same reference numerals, and detailed description thereof will be omitted as appropriate.
The supply unit 2 and the printing unit 4 of the printing device 601 shown in FIG. 22 are driven and operated by one driving device 111. The drive device 111 drives all the parts that operate at the time of printing in the supply unit 2 and the printing unit 4. The operation of the drive device 111 is controlled by the control device 602.

The supply unit 2 includes a feeder pile 5, a soccer device 6, a feeder board 7, a paper tail shaving device 102, a horizontal shaving device 103, a blowing foot 104, and the like. Among these devices, the feeder pile 5, the soccer device 6, the paper tail sabaki device 102, the horizontal sabaki device 103, and the blown foot 104 are the same as those shown in the first reference example . That is, the soccer device 6 is connected to the suction device 115 via the timing valve 114.

The paper tail sabaki device 102 and the blow foot 104 are connected to the compressed air supply device 121 via a timing valve 114. The lateral sabaki device 103 is connected to the compressed air supply device 121 without passing through the timing valve 114.
The suction device 115 includes an air suction pump 116 and a soccer valve 117. The compressed air supply device 121 is composed of a compressed air supply pump 122 and a Sabaki valve 123. The operation of the suction device 115 and the operation of the compressed air supply device 121 are individually controlled by the control device 402.

The feeder board 7 is the same as that shown in the second reference example . That is, the feeder board 7 transports the seat 3 by the transport belt 21, and the first to fourth suction chambers 211 are between the drive side pulley 22 on which the transport belt 21 is wound and the driven side pulley 23. It is equipped with ~ 214. The drive-side pulley 22 is driven by the supply unit drive device 11 to rotate.

The first to fourth suction chambers 211 to 214 have suction holes (not shown) covered by the transport belt 21. The transport belt 21 has a large number of suction holes (not shown).
The first and second suction chambers 211 and 212 are connected to an air suction portion of an upstream suction blower (not shown). The third and fourth suction chambers 213 and 214 are connected to the air suction portion 226a of the downstream suction blower 226.

An air release valve 231 is connected to the air suction portion 226a of the downstream suction blower 226. A register timing valve 235 is connected to the fourth suction chamber 214.
The operation of the upstream suction blower, the operation of the downstream suction blower 226, the operation of the atmosphere release valve 231 and the operation of the register timing valve 235 are controlled by the control device 602.

At the start of printing, the control device 602 according to this reference example operates the drive device 111 at a drive speed capable of high-speed printing without supplying the sheet 3. Further, the control device 602 operates the compressed air supply device 121 at the start of printing before the supply of the sheet 3 is started. That is, the Sabaki valve 123 is opened before the soccer valve 117 is opened, and the upper seat 3 of the seats 3 loaded on the feeder pile 5 is sufficiently separated, and the soccer device 6 that operates at high speed leads the head. The sheet 3 is taken out.

The leading sheet 3 is fed to the feeder board 7, is attracted to the transport belt 21, and is transported. At this time, the control device 602 operates the upstream suction blower and the downstream suction blower 226, and closes the atmosphere release valve 231 and the register timing valve 235. Further, the control device 602 opens the atmosphere release valve 231 and the register timing valve 235 when the second seat 3 reaches the tip suction area. The air release valve 231 is kept open thereafter. After that, the register timing valve 235 repeats the operation of closing when the seat 3 is passed to the swing device 37 and opening when the next seat 3 reaches the tip suction area.

Therefore, according to this reference example , the leading sheet 3 is conveyed by the feeder board 7 in a state of high suction force, and the second and subsequent sheets 3 are conveyed so that the register adjustment is correctly performed in the tip suction area. be able to.
When the leading sheet 3 is supplied to the printing unit 4, the control device 602 operates the supply unit 2 so as to synchronize with the printing unit 4 at the same speed.
Therefore, according to this reference example , the leading sheet 3 can be reliably taken out by the soccer device 6, and the examination adjustment by the front contact 25 can be performed with high accuracy on the leading sheet 3 and the subsequent sheets 3. Therefore, it is possible to provide a printing apparatus capable of high-speed printing from the first sheet 3.

In each of the above-described embodiments, an example of applying the present invention to an offset printing machine is shown. However, the present invention is not limited to the offset printing apparatus, and can be applied to digital printing apparatus and other printing apparatus.

1,101,201,301,401,501,601 ... Printing device, 2 ... Supply section, 3 ... Sheet, 4 ... Printing section, 5 ... Feeder pile, 6 ... Soccer device, 7 ... Feeder board, 11 ... Supply section Drive device 1 (supply unit drive means), 16 ... 1st encoder (supply unit phase detection means), 15, 113, 203, 302, 402, 502, 602 ... control device (control means), 31 ... printing unit Drive device (printing unit driving means), 39 ... second encoder (printing unit phase detecting means), 102 ... paper tail shaving device, 103 ... horizontal shaving device, 117 ... soccer valve, 121 ... compressed air supply device, 123 ... Sabaki valve, first to fourth suction chambers 211 to 214 (suction area), 231 ... Open to the atmosphere valve.

Claims (3)

A printing unit that prints on the conveyed sheet,
The printing unit has a supply unit that supplies sheets one by one.
In a printing device that prints on a sheet
The printing unit driving means for driving the printing unit and
The supply unit driving means for driving the supply unit and
A printing unit phase detecting means for detecting the phase of the printing unit, and
The supply unit phase detecting means for detecting the phase of the supply unit and
A control means for driving the supply unit by the supply unit driving means based on the detection result of the printing unit phase detecting means and the supply unit phase detecting means at the start of printing is provided.
After the printing unit is driven by the printing unit driving means, the supply unit accelerates while starting the supply of sheets at a low speed by the supply unit driving means, and supplies the first sheet to the printing unit. In some cases, a printing device that is driven at the same speed as the driving speed of the printing unit. A printing unit that prints on the conveyed sheet,
The printing unit has a supply unit that supplies sheets one by one.
In a printing device that prints on a sheet
The supply unit
A feeder board that has a suction area divided into a plurality of parts in the sheet transport direction, transports the sheet, and supplies the sheet to the printing unit.
An air release valve connected to the tip suction area on the most downstream side in the seat transport direction in the suction area,
Controls the opening / closing operation of the air release valve, which closes the air release valve until the first seat reaches the tip suction area and opens the air release valve when the second seat reaches the tip suction area. A printing device equipped with a control device. In the printing apparatus according to claim 1,
The supply unit further
A feeder board that has a suction area divided into a plurality of parts in the sheet transport direction, transports the sheet, and supplies the sheet to the printing unit.
It is equipped with an air release valve connected to the tip suction area on the most downstream side in the seat transport direction in the suction area.
The control means
Controls the opening / closing operation of the air release valve, which closes the air release valve until the first seat reaches the tip suction area and opens the air release valve when the second seat reaches the tip suction area. A printing device characterized by having a function.

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